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Definition of spiral
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of spiral is as below...
Spiral
(a.)
Winding
or
circling
round a
center
or pole and
gradually
receding
from it; as, the
spiral
curve of a watch
spring..
Lern More About Spiral
☛ Wiki Definition of Spiral
☛ Wiki Article of Spiral
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Rifle
::
Rifle (n.) A gun, the
inside
of whose
barrel
is
grooved
with
spiral
channels,
thus
giving
the ball a
rotary
motion
and
insuring
greater
accuracy
of fire. As a
military
firearm
it has
superseded
the
musket..
Suspiral
::
Suspiral
(n.) A
breathing
hole; a vent or
ventiduct.
Screw
::
Screw (n.) A
cylinder,
or a
cylindrical
perforation,
having
a
continuous
rib,
called
the
thread,
winding
round it
spirally
at a
constant
inclination,
so as to leave a
continuous
spiral
groove
between
one turn and the next, -- used
chiefly
for
producing,
when
revolved,
motion
or
pressure
in the
direction
of its axis, by the
sliding
of the
threads
of the
cylinder
in the
grooves
between
the
threads
of the
perforation
adapted
to it, the
former
being
distinguished
as the
external,
or male
screw,
or,
Stripe
::
Strip (n.) The
issuing
of a
projectile
from a
rifled
gun
without
acquiring
the
spiral
motion.
Stentor
::
Stentor
(n.) Any
species
of
ciliated
Infusoria
belonging
to the genus
Stentor
and
allied
genera,
common
in fresh
water.
The
stentors
have a
bell-shaped,
or
cornucopia-like,
body with a
circle
of cilia
around
the
spiral
terminal
disk. See
Illust.
under
Heterotricha..
Paucispiral
::
Paucispiral
(a.)
Having
few
spirals,
or
whorls;
as, a
paucispiral
operculum
or
shell..
Maara Shell
::
Maara shell () A
large,
pearly,
spiral,
marine
shell
(Turbo
margaritaceus),
from the
Pacific
Islands.
It is used as an
ornament..
Peristome
::
Peristome
(n.) The lip, or edge of the
aperture,
of a
spiral
shell..
Trica
::
Trica (n.) An
apothecium
in
certain
lichens,
having
a
spherical
surface
marked
with
spiral
or
concentric
ridges
and
furrows..
Revolution
::
Revolution
(n.)
Return
to a point
before
occupied,
or to a point
relatively
the same; a
rolling
back;
return;
as,
revolution
in an
ellipse
or
spiral..
Helispherical
::
Helispherical
(a.)
Spiral.
Tracheid
::
Tracheid
(n.) A wood cell with
spiral
or other
markings
and
closed
throughout,
as in pine
wood..
Tube
::
Tube (n.) A more or less
cylindrical,
and often
spiral,
case
secreted
or
constructed
by many
annelids,
crustaceans,
insects,
and other
animals,
for
protection
or
concealment.
See
Illust.
of
Tubeworm..
Curlycue
::
Curlycue
(n.) Some thing
curled
or
spiral,,
as a
flourish
made with a pen on
paper,
or with
skates
on the ice; a
trick;
a
frolicsome
caper..
Turbinal
::
Turbinal
(a.)
Rolled
in a
spiral;
scroll-like;
turbinate;
--
applied
to the thin,
plicated,
bony or
cartilaginous
plates
which
support
the
olfactory
and
mucous
membranes
of the nasal
chambers..
Scutibranchiata
::
Scutibranchiata
(n. pl.) An order of
gastropod
Mollusca
having
a heart with two
auricles
and one
ventricle.
The shell may be
either
spiral
or
shieldlike.
Spiral
::
Spiral
(a.) A plane
curve,
not
reentrant,
described
by a
point,
called
the
generatrix,
moving
along a
straight
line
according
to a
mathematical
law, while the line is
revolving
about a fixed point
called
the pole. Cf.
Helix..
Angienchyma
::
Angienchyma
(n.)
Vascular
tissue
of
plants,
consisting
of
spiral
vessels,
dotted,
barred,
and
pitted
ducts,
and
laticiferous
vessels..
Umbilicus
::
Umbilicus
(n.) A
depression
or
opening
in the
center
of the base of many
spiral
shells.
Helix
::
Helix (n.) A
nonplane
curve whose
tangents
are all
equally
inclined
to a given
plane.
The
common
helix is the curve
formed
by the
thread
of the
ordinary
screw.
It is
distinguished
from the
spiral,
all the
convolutions
of which are in the
plane..
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